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Message-ID:  <27990a880809180049p32a9f9c9x52612fa9a3b4d3a7@mail.gmail.com>
Date:         Thu, 18 Sep 2008 17:19:37 +0930
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From: Will Robertson <wspr81@GMAIL.COM>
Subject: Re: Array and amstext
To: LATEX-L@LISTSERV.UNI-HEIDELBERG.DE
In-Reply-To:  <48D202BE.6010908@morningstar2.co.uk>
Precedence: list
Status: R

On Thu, Sep 18, 2008 at 4:56 PM, Joseph Wright
<joseph.wright@morningstar2.co.uk> wrote:

>> Something like
>>   \IfOldPackageDate{2006/06/08}{...implement old functionality...}
>> )
>
> An interesting idea, but gets very complex very quickly (if one makes
> more than a trivial number of changes).

True. Perhaps a better idea, for those interested in absolute
backwards compatibility, is a (standard) method to keep the old
package versions lying around with standardised filenames (say,
siunitx-20080823.sty) that can be loaded when necessary.

Lance Carnes wrote about this sort of thing in an editorial in the
most recent PracTeX Journal. So I guess there must be *some* need for
it...

Will